For the past month or so I've been using my Yorkville Unity system for my mains because the jobs I've been doing were smaller and also had limited setup/teardown time so my Line Array, including my VTC DLMS 4080, has sat unused. This past weekend I had to pull the line array out again. We only had a total of 3 hours to set up PA, Set up back line, and get a rudimentary sound check done with volume restrictions until showtime. I powered up my system, put on some low level background music and everything sounded fine. We get into the show, which was a rock band, and I notice that the sound is kind of muddy but this is a VERY reverberant room so I'm chalking it up to acoustics. When I walk up front to check my amps I notice that my horns don't seem to be working. I go look at my processor and it has reset itself to default! allowing all pass to every amp.. I've run this processor for 4 years and never had this happen, but yes, I should have looked at the display to make sure that it recalled the proper preset, my fault. Needless to say that I now have 8 blown horn drivers. I reprogram the processor for two way operation and manage to EQ the system to sound at least passable, and manage to limp through the rest of the show. Fortunately I had 4 replacement drivers with me so I was able to get kind of up and going for the next night's job (both jobs last weekend were 120 miles from my shop).
My line array satellites have a built in 2 way crossover but when you switch from full range to bi-amp the crossovers are removed from the circuit completely. I'm thinking about either reworking the switching network so that the crossover stays in circuit with the horn drivers when the switch is in bi-amp mode or putting a 10uf cap in series with the bi-amp circuit high output so that there is at least some protection for the horns from events such as processor failure or transient thump from amps turning on and off. Since the switch completely takes the crossover out of circuit the additional cap should not interfere with the characteristics of the internal passive crossover during full range operation. Suggestions?